SMD Aluminium cap

Passives Capacitors
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1

Hi

Need help identifying the three smd caps circle in blue,a letter code after voltage? Also manufacturer if possible?

Thanks

IMG_6441
IMG_64411576×2100 316 KB

2

Thank you for your inquiry and welcome to the community.

I searched everything we have and I didn’t find a match for that letter after the voltage. If I were to take a guess it may indicate what series capacitor it came from from that specific manufacturer.

To be able to find you comparable capacitors from something we do carry if you could please provide the physical diameter of the capacitors it is highly likely we have comparable parts.

1 Like
3

rihard777333
Please, provide the physical diameter of the capacitors!

4

Hello @rihard777333,

This video may help you and @Kristof_2649 determine the size of the capacitors.

Happy soldering.

Aaron

5

In this case, I have not found specific capacitor series’ which definitively correspond to the markings on your caps. I think it’s possible that the two with the “B” next to the voltage might be the following:

  • ATB336M063 Cornell Dubilier ATB series 63V 33uF D = 8mm, H = 10.2H mm
  • ATB107M063 Cornell Dubilier ATB series 63V 100uF D = 10mm, H = 10.2H mm

And the one with the “Z” marking might be the this one:

  • 477AXZ016M Cornell Dubilier AXZ series 16V 470uF D = 8mm, H = 10.2H mm

Unfortunately, their respective datasheets do not show how they mark their parts, so can’t say with any certainty.

However, finding the exact series is usually not critical as long as you go for the higher quality better-spec’d parts. To do this, I would recommend the following procedure:

  • Start by finding parts with the same or slightly higher capacitance value. For aluminum electrolytic capacitors, going slightly higher usually is fine, as the purpose of these caps is typically for storing charge rather than creating a filter with a specific bandwidth.

  • Next, filter for parts with the same or higher voltage rating. Going to a higher voltage rated part only reduces the likelihood that they would be damaged by voltage surges. The only negative to going with a higher voltage is that it often requires a physically larger package.

  • Then, filter for parts with the same footprint size. With surface mount parts, the footprint is fairly standardized, based on the diameter of the capacitor body, so measure the diameter of your part and filter for that specific diameter.

  • Next, filter for caps that are at least as tall as your current part and up to as tall as your physical space will allow. Given a specific diameter, taller parts will tend to have better current handling and lower heating characteristics, which can extend their life.

Once you have filtered down to parts with the right capacitance, voltage, footprint, and height range, look for ones with higher temperature ratings, longer lifetimes at that temperature, and lower ESR or higher ripple current ratings, as those parts typically perform better in most circuits.